Find all zeros of the polynomial 
it its two zeros are 
and 
.
We know that if 
is a zero of a polynomial then 
Since 
and 
are zeros of 
Therefore 
and 
are factors of 
.
Now on dividing 
⇒ 
to find other zeros.
By applying division algorithm, we have:
= 
(
)
= 
(
)
= 
{
}
Hence, the zeros of the given polynomial are: 
6